Nibelsnarf

Disguise {w/b}{w/b}(You may cast this face down for {3} as a 2/2 creature with ward {2}. Turn it face up
any time for its disguise cost.)
When Nibelsnarf is turned face up, destroy target creature with mana value 3 or less.
{w}, Discard a card: Cloak Nibelsnarf. It gains
hexproof until end of turn.